Finding the Third Proportional to 518,626.50 and 699,145.50

Step by Step Solution

1. Step 1: Write the proportion equation
   518,626.50 : 699,145.50 = 699,145.50 : x
2. Step 2: Convert to fraction form
   518,626.50/699,145.50 = 699,145.50/x
3. Step 3: Cross multiply
   518,626.50x = 699,145.50 × 699,145.50
4. Step 4: Simplify right side
   518,626.50x = 488,804,430,170.25
5. Step 5: Solve for x
   x = 488,804,430,170.25/518,626.50
6. Step 6: Final answer
   x = 942,497.98